static/freebsd/man4/dtrace_cam.4 4.html


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<table class="head">
  <tr>
    <td class="head-ltitle">DTRACE_CAM(4)</td>
    <td class="head-vol">Device Drivers Manual</td>
    <td class="head-rtitle">DTRACE_CAM(4)</td>
  </tr>
</table>
<div class="manual-text">
<section class="Sh">
<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
<p class="Pp"><code class="Nm">dtrace_cam</code> &#x2014; <span class="Nd">a
    DTrace provider for tracing events related to CAM</span></p>
</section>
<section class="Sh">
<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
<p class="Pp"><code class="Fn">cam::xpt:action</code>(<var class="Fa" style="white-space: nowrap;">union
    ccb *ccn</var>);</p>
<p class="Pp"><code class="Fn">cam::xpt:done</code>(<var class="Fa" style="white-space: nowrap;">union
    ccb *ccb</var>);</p>
<p class="Pp"><code class="Fn">cam::xpt:async-cb</code>(<var class="Fa" style="white-space: nowrap;">void
    *cbarg</var>, <var class="Fa" style="white-space: nowrap;">uint32_t
    async_code</var>, <var class="Fa" style="white-space: nowrap;">struct
    cam_path *path</var>, <var class="Fa" style="white-space: nowrap;">void
    *async_Arg</var>);</p>
</section>
<section class="Sh">
<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
<p class="Pp">The <code class="Nm">cam</code> provider allows the tracing of CAM
    events. The
    <a class="permalink" href="#cam::xpt_action"><code class="Fn" id="cam::xpt_action">cam::xpt_action</code></a>()
    probe fires when a CAM Control Block (ccb) is submitted to a CAM SIM driver.
    The
    <a class="permalink" href="#cam::xpt:done"><code class="Fn" id="cam::xpt:done">cam::xpt:done</code></a>()
    probe fires when that request completes. The
    <a class="permalink" href="#cam::xpt:async-cb"><code class="Fn" id="cam::xpt:async-cb">cam::xpt:async-cb</code></a>()
    probe fires just before an async callback is called.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="ARGUMENTS"><a class="permalink" href="#ARGUMENTS">ARGUMENTS</a></h1>
</section>
<section class="Sh">
<h1 class="Sh" id="FILES"><a class="permalink" href="#FILES">FILES</a></h1>
</section>
<section class="Sh">
<h1 class="Sh" id="EXAMPLES"><a class="permalink" href="#EXAMPLES">EXAMPLES</a></h1>
</section>
<section class="Sh">
<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
  ALSO</a></h1>
<p class="Pp"><a class="Xr">dtrace(1)</a>, <a class="Xr">SDT(9)</a></p>
</section>
<section class="Sh">
<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
<p class="Pp">The <code class="Nm">cam</code> provider first appeared in
    <span class="Ux">FreeBSD</span> 15.1 and 16.0.</p>
</section>
<section class="Sh">
<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
<p class="Pp">This manual page was written by <span class="An">Warner
    Losh</span>
    &lt;<a class="Mt" href="mailto:imp@FreeBSD.org">imp@FreeBSD.org</a>&gt;.</p>
</section>
</div>
<table class="foot">
  <tr>
    <td class="foot-date">December 26, 2025</td>
    <td class="foot-os">FreeBSD 15.0</td>
  </tr>
</table>